The 1991 Great American Bash was the third annual Great American Bash professional wrestling pay-per-view event produced by World Championship Wrestling (WCW), and the seventh annual Great American Bash event overall. It was also the first held by WCW alone following its split from the National Wrestling Alliance (NWA) in January 1991. The event took place on July 14, 1991, at the Baltimore Arena in Baltimore, Maryland. This was the fourth Great American Bash held at this venue after the 1988, 1989, and 1990 events.

The original scheduled card of the event was heavily changed. Ric Flair was scheduled to defend the WCW World Heavyweight Championship against Lex Luger in a steel cage match, but Flair quit WCW before the event and was replaced by Barry Windham, with the match being for the vacant championship. Luger defeated Windham to win his first world championship. The final bout of the show was a handicap steel cage match, in which Rick Steiner defeated Arn Anderson and Paul E. Dangerously.

In the advertised main event, Lex Luger pinned Barry Windham, who replaced Flair, after delivering a piledriver on the orders of Harley Race. After the match, Luger turned heel and appointed Race as his manager and Mr. Hughes as his bodyguard.

P. N. News and Bobby Eaton were scheduled to face Steve Austin and Terrance Taylor in a traditional scaffold match but, on the day of the show, a "capture the flag" stipulation was added as the wrestlers were unwilling to perform a risky fall from the scaffold.

Dustin Rhodes and The Young Pistols (Tracy Smothers and Steve Armstrong) faced The Fabulous Freebirds in a six-man elimination match.

The masked Yellow Dog defeated Johnny B. Badd by disqualification when Badd's manager Teddy Long interfered to try and unmask Yellow Dog; had he done so, Brian Pillman (who was wrestling under the mask) would not have been allowed to wrestle in WCW again.

The final match was originally supposed to pit The Steiner Brothers and Missy Hyatt against Arn Anderson, Barry Windham and Paul E. Dangerously. After Windham was moved to the title match following Flair's departure from WCW and Scott Steiner sustained a bicep injury at the June 12 Clash of the Champions, the match was changed into a mixed tag team match pitting Rick Steiner and Missy Hyatt against Arn Anderson and Paul E. Dangerously. Before the match, Dick Murdoch and Dick Slater kidnapped Hyatt and forcibly took her backstage, turning the match into an 2-on-1 handicap match which Steiner won (in reality, this was done because the Maryland State Athletic Commission did not allow intergender matches).